package com.ruoyi.framework.aspectj;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.ruoyi.common.annotation.DataScopePlus;
import com.ruoyi.common.core.domain.entity.SysRole;
import com.ruoyi.common.core.domain.entity.SysUser;
import com.ruoyi.common.core.domain.model.LoginUser;
import com.ruoyi.common.core.text.Convert;
import com.ruoyi.common.utils.SecurityUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.framework.security.context.PermissionContextHolder;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;

@Aspect
@Component
public class DataScopePlusAspect {

    /**
     * 全部数据权限
     */
    public static final String DATA_SCOPE_ALL = "1";

    /**
     * 自定数据权限
     */
    public static final String DATA_SCOPE_CUSTOM = "2";

    /**
     * 部门数据权限
     */
    public static final String DATA_SCOPE_DEPT = "3";

    /**
     * 部门及以下数据权限
     */
    public static final String DATA_SCOPE_DEPT_AND_CHILD = "4";

    /**
     * 仅本人数据权限
     */
    public static final String DATA_SCOPE_SELF = "5";

    @Before("@annotation(controllerDataScope)")
    public void doBefore(JoinPoint point, DataScopePlus controllerDataScope) throws Throwable
    {
        //clearDataScope(point);
        handleDataScope(point, controllerDataScope);
    }

    private void handleDataScope(JoinPoint point, DataScopePlus controllerDataScope) {

        LoginUser loginUser = SecurityUtils.getLoginUser();
        if (StringUtils.isNotNull(loginUser))
        {
            SysUser currentUser = loginUser.getUser();
            // 如果是超级管理员，则不过滤数据
            if (StringUtils.isNotNull(currentUser) && !currentUser.isAdmin())
            {
                String permission = StringUtils.defaultIfEmpty(controllerDataScope.permission(), PermissionContextHolder.getContext());
                dataScopeFilter(point, currentUser, controllerDataScope.isDeptScope(),
                        controllerDataScope.isUserScope(), permission);
            }
        }

    }

    public static void dataScopeFilter(JoinPoint joinPoint, SysUser user, boolean isDeptScope, boolean isUserScope, String permission){

        StringBuilder sqlString = new StringBuilder();
        List<String> conditions = new ArrayList<String>();

        for (SysRole role : user.getRoles())
        {
            String dataScope = role.getDataScope();
            if (!DATA_SCOPE_CUSTOM.equals(dataScope) && conditions.contains(dataScope))
            {
                continue;
            }
            if (StringUtils.isNotEmpty(permission) && StringUtils.isNotEmpty(role.getPermissions())
                    && !StringUtils.containsAny(role.getPermissions(), Convert.toStrArray(permission)))
            {
                continue;
            }
            if (DATA_SCOPE_ALL.equals(dataScope))
            {
                sqlString = new StringBuilder();
                conditions.add(dataScope);
                break;
            }
            else if (DATA_SCOPE_CUSTOM.equals(dataScope)&&isDeptScope)
            {
                sqlString.append(StringUtils.format(
                        " OR dept_id IN ( SELECT dept_id FROM sys_role_dept WHERE role_id = {} ) ",
                        role.getRoleId()));
            }
            else if (DATA_SCOPE_DEPT.equals(dataScope)&&isDeptScope)
            {
                sqlString.append(StringUtils.format(" OR dept_id = {} ", user.getDeptId()));
            }
            else if (DATA_SCOPE_DEPT_AND_CHILD.equals(dataScope)&&isDeptScope)
            {
                sqlString.append(StringUtils.format(
                        " OR dept_id IN ( SELECT dept_id FROM sys_dept WHERE dept_id = {} or find_in_set( {} , ancestors ) > 0 )",
                         user.getDeptId(), user.getDeptId()));
            }
            else if (DATA_SCOPE_SELF.equals(dataScope))
            {
                if (isUserScope)
                {
                    sqlString.append(StringUtils.format(" OR user_id = {} ", user.getUserId()));
                }
                else
                {
                    // 数据权限为仅本人且没有userAlias别名不查询任何数据
                    sqlString.append(StringUtils.format(" OR dept_id = 0 "));
                }
            }
            conditions.add(dataScope);
        }

        // 多角色情况下，所有角色都不包含传递过来的权限字符，这个时候sqlString也会为空，所以要限制一下,不查询任何数据
        if (StringUtils.isEmpty(conditions))
        {
            sqlString.append(StringUtils.format(" OR dept_id = 0 "));
        }

        if (StringUtils.isNotBlank(sqlString.toString()))
        {
            Object params = joinPoint.getArgs()[0];
            if (StringUtils.isNotNull(params) && params instanceof QueryWrapper)
            {
                ((QueryWrapper<?>) params).apply(sqlString.substring(4));
            }
        }

    }

}
